メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.05858383701 34.8687901632333, 137.057856431213 34.8688231794439, 137.057862568712 34.8690441898343, 137.057832430351 34.8690411347615, 137.05772168443 34.8690333585007, 137.057585514805 34.8685536174588, 137.058585763795 34.8685113377696, 137.05858383701 34.8687901632333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral